This is topic Help! Amp Install - Firewall?? in forum Tech Talk at Northern California Ford Owners  .


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Posted by Midnight5.0 (Member # 597) on :
 
I'm trying to install an amp in my 1990 GT, but I am stuck on how to get the ground to the battery. Where do I run it through the firewall?
 

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Posted by st5150 (Member # 51) on :
 
Unless you're isolating noise problems, ground the amp to the cassis.
 

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Posted by Midnight5.0 (Member # 597) on :
 
I messed up. I meant that I need to run the power to the battery, not the ground. The amp is grounded already, I just need to get through the firewall.
 

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Posted by st5150 (Member # 51) on :
 
Feed it through the edge of a rubber boot of an existing hose/wire, ect going through the firewall. Don't forget to FUSE the power wire as close as you can to the possitive battery terminal.
 

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Posted by Blown Mystic (Member # 476) on :
 
drill a hole and get grommets to seal it off if u cant use an existing hole.
 

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Posted by LAST302 (Member # 808) on :
 
There is a boot up under the dash on the driver side. Feed it through that hole. Then just run the power lead along the carpet line under the plastic door jam and back under the seat. Its a 5 minute job. Like 5150 said, dont forget to run a fuse up near the battery.
 

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Posted by GRNBNDT (Member # 1091) on :
 
depending on how much power you are runnin, i have a fuse in the front and in the back.... just to be careful...
 

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